<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./main.css">
  <style>
    h2 {
      color: red;
    }

    div {
      color: green;
      font-size: 40px;
    }

    p {
      color: blue;
      font-size: 40px;
    }
  </style>
</head>

<body>
  <h2>title2</h2>
  <div>box1</div>
  <p>hello p1</p>
  <h2>title2</h2>
  <div>box2</div>
  <p>hello p2</p>
  <h2>title3</h2>
  <div>box3</div>
</body>

</html>